Exemplo n.º 1
0
  @SuppressWarnings("unchecked")
  private final Command mergeGetCommands(
      final Command currentCmd,
      final Queue writeQueue,
      final Queue<Command> executingCmds,
      CommandType expectedCommandType) {
    Map<Object, Command> mergeCommands = null;
    int mergeCount = 1;
    final CommandCollector commandCollector = creatCommandCollector();
    currentCmd.setStatus(OperationStatus.WRITING);

    commandCollector.visit(currentCmd);
    while (mergeCount < mergeFactor) {
      Command nextCmd = (Command) writeQueue.peek();
      if (nextCmd == null) {
        break;
      }
      if (nextCmd.isCancel()) {
        writeQueue.remove();
        continue;
      }
      if (nextCmd.getCommandType() == expectedCommandType) {
        if (mergeCommands == null) { // lazy initialize
          mergeCommands = new HashMap<Object, Command>(mergeFactor / 2);
          mergeCommands.put(currentCmd.getKey(), currentCmd);
        }
        if (log.isDebugEnabled()) {
          log.debug("Merge get command:" + nextCmd.toString());
        }
        nextCmd.setStatus(OperationStatus.WRITING);
        Command removedCommand = (Command) writeQueue.remove();
        // If the key is exists,add the command to associated list.
        if (mergeCommands.containsKey(removedCommand.getKey())) {
          final AssocCommandAware mergedGetCommand =
              (AssocCommandAware) mergeCommands.get(removedCommand.getKey());
          if (mergedGetCommand.getAssocCommands() == null) {
            mergedGetCommand.setAssocCommands(new ArrayList<Command>(5));
          }
          mergedGetCommand.getAssocCommands().add(removedCommand);
        } else {
          commandCollector.visit(nextCmd);
          mergeCommands.put(removedCommand.getKey(), removedCommand);
        }
        mergeCount++;
      } else {
        break;
      }
    }
    commandCollector.finish();
    if (mergeCount == 1) {
      return currentCmd;
    } else {
      if (log.isDebugEnabled()) {
        log.debug("Merge optimieze:merge " + mergeCount + " get commands");
      }
      return newMergedCommand(mergeCommands, mergeCount, commandCollector, expectedCommandType);
    }
  }
Exemplo n.º 2
0
  @SuppressWarnings("unchecked")
  private final Command mergeBuffer(
      final Command firstCommand,
      final Queue writeQueue,
      final Queue<Command> executingCmds,
      final int sendBufferSize) {
    Command lastCommand = firstCommand; // ��苟������涓�ommand
    Command nextCmd = (Command) writeQueue.peek();
    if (nextCmd == null) {
      return lastCommand;
    }

    final List<Command> commands = getLocalList();
    final ByteBuffer firstBuffer = firstCommand.getIoBuffer().buf();
    int totalBytes = firstBuffer.remaining();
    commands.add(firstCommand);
    boolean wasFirst = true;
    while (totalBytes + nextCmd.getIoBuffer().remaining() <= sendBufferSize
        && (nextCmd = (Command) writeQueue.peek()) != null) {
      if (nextCmd.getStatus() == OperationStatus.WRITING) {
        break;
      }
      if (nextCmd.isCancel()) {
        writeQueue.remove();
        continue;
      }
      nextCmd.setStatus(OperationStatus.WRITING);

      writeQueue.remove();

      if (wasFirst) {
        wasFirst = false;
      }
      // if it is get_one command,try to merge get commands
      if ((nextCmd.getCommandType() == CommandType.GET_ONE
              || nextCmd.getCommandType() == CommandType.GETS_ONE)
          && optimiezeGet) {
        nextCmd = mergeGetCommands(nextCmd, writeQueue, executingCmds, nextCmd.getCommandType());
      }

      commands.add(nextCmd);
      lastCommand = nextCmd;
      totalBytes += nextCmd.getIoBuffer().remaining();
      if (totalBytes > sendBufferSize) {
        break;
      }
    }
    if (commands.size() > 1) {
      byte[] buf = new byte[totalBytes];
      int offset = 0;
      for (Command command : commands) {
        byte[] ba = command.getIoBuffer().array();
        System.arraycopy(ba, 0, buf, offset, ba.length);
        offset += ba.length;
        if (command != lastCommand
            && (!command.isNoreply() || command instanceof BaseBinaryCommand)) {
          executingCmds.add(command);
        }
      }
      lastCommand.setIoBuffer(IoBuffer.wrap(buf));
    }
    return lastCommand;
  }